Foldable bed frame

ABSTRACT

A foldable bed frame includes a pair of generally rectangular shaped sub-frames foldably attached to each other so as to be folded in a collapsed condition and unfolded to an open condition for use as a mattress support. The foldable attachment is such that when the sub-frames are unfolded to the open condition, a generally central transverse support means is located at the interface thereof. A pair of support members is positioned beneath the transverse support means and in generally perpendicular relation thereto. The support members are attached to the sub-frames in supporting engagement with the transverse support means when the sub-frames are unfolded to the open condition to provide support to the pair of sub-frames at the interface thereof. The pair of support members is attached to the sub-frames so as to be drawn away from the transverse support means when the sub-frames are folded to the collapsed condition.

CROSS REFERENCE TO RELATED APPLICATION

This application is a continuation-in-part of U.S. patent application Ser. No. 11/813,426 filed on Dec. 3, 2007, the content of which is incorporated by reference and made part of this application.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a foldable bed frame, and more particularly to a middle support rest structure of a foldable bed frame.

2. Description of Prior Art

Conventional foldable bed frames known in the art typically include two sub-frame members, which are hinged together at adjacent ends proximate a central portion of the bed, and two pair of end legs with one pair positioned at the head end and the second pair positioned at the opposing foot end of the bed. Each sub-frame includes an inner end, and outer end and two opposing side supports provided therebetween to form a generally rectangular sub-frame. A central support rest portion is provided on opposing sides proximate the inner ends of the adjacent sub-frames to support the central portion of the foldable bed. When the foldable bed is in an open state or condition, the inner ends of the two sub-frame members are positioned adjacent such that a single horizontal bed frame is provided. The two pairs of opposing legs are pivotally attached at the outer ends of each sub-frame and extend downward to the ground substantially perpendicular with respect to the horizontal foldable bed in an open condition. When closing the foldable bed, the two opposing pairs of end legs can be rotated or folded inward towards the inner ends of each sub-frame such that they are positioned parallel with the side supports of the sub-frames. Further, the two sub-frame members can also be rotated or folded inward at a hinged or pivotal center portion until they are in an abutting position, to thereby reduce the foldable bed frame into a smaller and more manageable structure that can be readily stored.

When opening the foldable bed frame, the middle support rests centrally located on both sides of the bed between the opposing head and foot ends (i.e., outer ends of the sub-frames) prevent the middle portion from collapsing. A pair of cross-braces is provided with each middle support rest on each side of the bed, where each pair is pivotally attached to a respective middle support rest. For each pair of cross-braces, a first end of one of the cross-braces is attached to one of the sub-frame members, while a first end of the second cross-brace is attached to the other sub-frame. The second ends of the pair of cross-braces are pivotally attached to a corresponding middle support rest. Accordingly, each middle support rest pivots about the second end of a pair of cross-braces at each side of the bed, while the opposing first ends of the paired cross-braces are respectively pivoted to the adjacent sub-frame members, to thereby increase support and stability while preventing the middle of the bed from sagging or collapsing.

However, a disadvantage with the prior art folding bed frames is that the pivoting joint between each pair of cross-braces and the middle support rest allows the middle support rests to freely rotate about the pivoting points at the cross-braces without any control mechanism. To overcome this uncontrolled otational movement of the middle support rests while opening the foldable bed, the middle support rests are typically held steady in a vertical position by hand, while contemporaneously unfolding the sub-frame members of the bed. Thus, the opening (and closing) of the bed can be a difficult operation to perform by a single person because of the large size and weight of the foldable bed, as well as uncontrolled rotation of the middle support rests.

SUMMARY OF THE INVENTION

The disadvantages heretofore associated with the prior art are overcome by the present invention of a foldable bed frame, where in one embodiment, a foldable bed frame includes at least a pair of generally rectangular shaped sub-frames foldably attached to each other so as to be folded in a collapsed condition and unfolded to an open condition for use as a mattress support. The foldable attachment is arranged and configured such that when the sub-frames are unfolded to the open condition, a generally central transverse support means is located at the interface thereof. A pair of laterally spaced apart support members is positioned beneath the generally central transverse support means and in generally perpendicular relation thereto. The spaced apart support members can be attached to the sub-frames in a manner to be in supporting engagement with the generally central transverse support means when the sub-frames are unfolded to the open condition, to thereby provide support to the pair of sub-frames at the interface thereof. Each of the pair of spaced apart support members are attached to the sub-frames in a manner to be drawn away from the generally central transverse support means when the sub-frames are folded to the collapsed condition.

In one aspect, each of the generally rectangular shaped sub-frames comprises a pair of substantially parallel, spaced apart side support members respectively having proximal and distal ends. The side support members are connected by lateral support members at a location between the proximal and distal ends of the side support members, and at a location at or near the distal ends. The lateral support members are shorter in length than the side support members.

In another aspect, each of the generally rectangular shaped sub-frames further includes a pair of spaced apart support legs having respective free ends. Each of the support legs are pivotally connected to the generally rectangular shaped sub-frame at or near the distal ends of the side supports. The support legs are connected to each other by a lateral support member positioned between the rectangular shaped sub-frame and the free ends of the support legs. The support legs are pivotal between a position substantially parallel to the rectangular shaped sub-frame and a position generally perpendicular thereto.

In yet another aspect of the present embodiment, each of the pair of laterally spaced apart support members are connected to each sub-frame by a pair of angled supporting braces having a first end and a second end. The first ends of the supporting braces are pivotally connected to the laterally spaced apart support members, and the second ends of the supporting braces are pivotally connected to the respective sub-frame.

In still another aspect of the first embodiment, the generally transverse support means is a pivotal lateral support member commonly joining the proximal ends of the side supports of each of the sub-frames to permit the sub-frames to be folded with respect to each other. Moreover, each of the support legs can be connected to the generally rectangular shaped sub-frame by a brace member. The brace member is pivotally connected to the generally rectangular shaped sub-frame on one end and slidably connected to the support legs at another end, such that the support legs are movable from the position generally perpendicular to the generally rectangular shaped sub-frame to the position generally parallel to the generally rectangular shaped sub-frame.

In yet another aspect of the first embodiment of the present invention, a lateral support member is provided at or near the proximal end of each of the sub-frames. Moreover, the lateral support members located at or near the proximal ends of the sub-frames move toward each other to be engaged in adjacent relation to form the transverse support means when the sub-frames are in the open condition.

In another aspect, one or more fasteners can be coupled to at least one side support member. The fasteners can be brackets, latches, bolts or any other fastener to retain a side support member of an adjacent foldable bed frame thereto.

In another embodiment of the present invention, a foldable bed frame comprises at least a pair of sub-frames, where each the sub-frame is constructed of a plurality of elongated members respectively connected to form a generally rectangular shaped section. Each of the generally rectangular shaped sections is pivotally connected to the other by a generally central transverse pivotal support member, and the generally rectangular shaped sections are pivotal between an open generally co-planar position for use as a mattress support, and a folded position, whereby the generally rectangular shaped sections are in face-to-face relation. A pair of support legs is respectively pivotally connected to each of the generally rectangular shaped sections at the free end thereof, and foldable from a position generally parallel to the plane of each the respective generally rectangular shaped section, to a position generally perpendicular to each respective generally rectangular shaped section, where the last mentioned position is capable of supporting the generally rectangular shaped sections in a generally horizontal position for use as a mattress support.

A pair of laterally spaced apart support members is positioned beneath the generally central transverse pivotal support member and in generally perpendicular relation thereto. The spaced apart support members are in supporting engagement with the generally transverse pivotal support member when the pair of generally rectangular shaped sections is in the open condition to provide support to the pair of generally rectangular shaped sections at the pivotal connection thereof. Each of the pair of laterally spaced apart support members are respectively attached to the pair of generally rectangular shaped sections in a manner to be withdrawn away from the central transverse pivotal support member when the sub-frames are pivotally folded toward each other.

In yet another embodiment of the present invention, a foldable bed frame comprises at least a pair of sub-frames, where each sub-frame includes a plurality of elongated members respectively connected to form a generally rectangular shaped section. Each rectangular shaped section is foldably attached to the other so as to be folded to a collapsed condition and unfolded to an open co-planar condition for use as a mattress support.

Further, each of the generally rectangular shaped sections has at least one side member adjacent to a corresponding side member of the other generally rectangular shaped section, such that when the generally rectangular shaped sections are unfolded to the open condition, the correspondingly adjacent side members engage each other in contacting relation to form a generally central transverse support structure.

A pair of laterally spaced apart support members is positioned beneath the generally central transverse support structure and in generally perpendicular relation thereto. The spaced apart support members are movable into supporting engagement with the generally central transverse support structure when the generally rectangular shaped sections are unfolded to the open condition, to thereby provide support to the pair of generally rectangular shaped sections at the interface thereto. The pair of laterally spaced apart support members can be drawn away from the central transverse support structure when the generally rectangular shaped sections are folded to the collapsed condition.

BRIEF DESCRIPTION OF THE DRAWINGS

Further advantages and features of the present invention will become apparent from the detailed description of a preferred embodiment of the invention with reference to the accompanying drawings, in which:

FIG. 1 is a perspective view of a first embodiment of a foldable bed of the present invention shown in a fully opened position;

FIG. 2 is a perspective view showing the folding action of the foldable bed of FIG. 1;

FIG. 3 is a perspective view of the foldable bed of FIG. 1 in a fully closed position;

FIG. 4 is a perspective view of a second embodiment of a foldable bed of the present invention shown in a fully opened position;

FIG. 5 is a perspective view of the foldable bed of FIG. 4 in a partially closed position;

FIG. 6 is an enlarged partial perspective view of support rests of the foldable bed of FIG. 4 in a partially closed position;

FIG. 7 is a perspective view of the foldable bed of FIG. 4 in a fully closed position;

FIG. 8 is an enlarged partial perspective view depicting an alternate embodiment of support rests of the foldable bed of FIG. 4 in a partially closed position; and

FIG. 9 is a perspective view of two side-by-side foldable bed frames of FIG. 4 in the fully opened position with a pair of mattresses supported thereon.

To facilitate an understanding of the invention, identical reference numerals have been used, when appropriate, to designate the same or similar elements that are common to the figures. Further, unless stated otherwise, the features shown in the figures are not drawn to scale, but are shown for illustrative purposes only.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

Referring to FIG. 1, a first embodiment of a foldable bed frame 1 of the present invention is illustratively shown. The foldable bed frame 1 comprises two sub-frame members 4 and 5 positioned adjacently, two pair of opposing end legs 2, and a middle support rest 3. Each sub-frame 4 and 5 can include an inner cross-member 9 and 10, respectively, and an outer cross-member 11 and 12, respectively. The inner and outer cross members of each sub-frame can be connected to each other via opposing side support members to form a substantially rectangular shaped sub-frame. For example, sub-frame 4 includes inner cross-member 9 and outer cross-member 11, which are joined at each respective opposing end by a pair of side supports 14. Similarly, sub-frame 5 includes inner cross-member 10 and outer cross-member 12, which are joined at each respective opposing end by a pair of side supports 15. Although the sub-frames 4 and 5 are illustratively shown and described as being substantially rectangular, such rectangular shape is not considered limiting.

The middle support rest 3 is configured as an H-shape support member having two vertical leg or stem portions 6, each of which are pivotally attached to the sub-frames by two pairs of cross-braces 31. The vertical legs 6 are interconnected by a cross-bar member 8. In particular, each cross-brace of a first pair of cross-braces 31 have a first end that are pivotally connected to a portion of a first vertical leg portion 6 of the H-shaped support rest 3. The opposing end of a first cross-brace 31 of the first pair of cross-braces is pivotally connected to the sub-frame 4, and the opposing end of a second cross-brace 31 of the first pair of cross-braces is pivotally connected to the sub-frame 5. The second vertical leg portion 6 of the H-shaped support rest 3 is attached to the sub-frames 4 and 5 by a second pair of cross-braces 31 in the same pivotal manner as the first pair of cross-braces, as shown in FIG. 1.

Each cross-brace 31 includes a stopper member 311 extending along its first end. The stopping members 311 are positioned to contact the opposing sides of the vertical stems 6 to hold the vertical stems 6 in vertical alignment. Alternatively, the stopping members 311 are positioned to contact opposing sides of the cross-bar member 8. Each of the opposing vertical leg portions 6 of the middle support rest 3 further includes a substantially horizontal flange 32 formed at the upper end for interfacing and supporting the adjacent positioned ends of the sub-frames 4 and 5 when the bed frame 1 is unfolded to an opened position. The horizontal flange is preferably a U or V-shaped flange, although such shape is not considered limiting.

Referring to FIG. 2, with respect to folding the bed frame to a closed position, the bed 1 is folded closed in a conventional manner by folding both end leg pairs 2 at each end (i.e., head end and foot end) of the sub-frames 4 and 5 inwardly towards the center of the bed frame 1 from a perpendicular position to a parallel position with respect to the sub-frames 4 and 5. The sub-frames 4 and 5 are then folded together at the pivot points formed by the second ends of the cross-braces 31, such that the folded bed frame 1 forms a quadrate structure, as shown in FIG. 3.

To open the closed bed frame 1, the reverse sequence operation can be performed. In particular, the outer ends (e.g., outer cross-members 11 and 12) of the adjacent sub-frames 4 and 5 are separated from each other by hand to form a substantially horizontal single bed frame structure. The opposing cross-braces 31 that are pivotally attached to each leg 6 of the middle support rest 3 have stoppers 311 extending at the lower first ends thereof, which catch or otherwise interface with opposing sides of the cross-bar member 8 of the H-shaped middle support rest 3 as the outer ends 11 and 12 of the sub-frames are pulled away from each other about the pivot points provided by the cross-braces 31. In this manner, the middle support rest 3 is aligned in an upright standing configuration to readily support the adjacent inner end portions 9 and 10 of the sub-frames 4 and 5 without any offset or tilting. Additionally, the U-shaped slots 32 formed at the upper ends of the two vertical stems 6 of the middle support rest 3 catch on the inner cross-members 9 and 10 (FIG. 2) of the sub-frames 4 and 5 as spreading out for making the supporting more stable.

More specifically, the stoppers 311 extending from the first ends of the cross-braces 31 respectively catch and interface with opposing sides of the vertical legs 6 (or cross-bar member 8) of the middle support rest 3 to further assist in positioning the middle support rest 3 in an upright configuration such that the legs 6 are substantially perpendicular with respect to the sub-frames 4 and 5, as the U-shaped slots 32 catch and interface with the inner cross-members 9 and 10. In this manner, the stoppers 311 and U-shaped slots 32 provides vertical alignment as the H-shaped middle support rest 3 is moved upward into position to support the inner end portions 9 and 10 of the sub-frames 4 and 5.

FIGS. 4-8 illustrate another embodiment of the foldable bed frame 101 of the present invention. Referring to FIG. 4, the bed frame 101 is constructed from a pair of sub-frames 103 and 104 which are pivotally coupled together. Each sub-frame 103 and 104 includes a plurality of elongated members, for example elongated members 105, 107, 109, 113 and the like. The elongated members can be constructed from various substantially rigid materials including, but not limited to, metals, metal alloys, hardened plastic, composite material and/or combinations thereof. The sub-frames 103 and 104 can be of any shape or size suitable for supporting a mattress 200, but in this particular embodiment, the sub-frames 103 are preferably rectangular in shape. In this particular embodiment, each of the sub-frames 103 and 104 are constructed of a pair of substantially parallel spaced apart side support members 105 having proximal and distal ends 105 a, 105 b. The side support members 105 are connected by intermediate support members 107 positioned between the proximal and distal ends of the side support members 105 a, 105 b. Preferably, the intermediate support members 107 are positioned approximately intermediate of the proximal and distal ends 105 a, 105 b as shown in FIG. 4. The side support members 105 are further connected by outer lateral support members 109 at the distal ends 105 b of the side support members 105.

Each of the generally rectangular shaped sub-frames 103 and 104 have a pair of spaced apart support legs 111 having free ends 111 a. The support legs 111 of each pair can be connected to each other by a lateral leg support member 113. A pair of support legs 111 is pivotally connected to the sub-frames 103 and 104, respectfully, at or near the distal end 105 b of the side supports 105. The support legs 111 are generally positioned perpendicular with respect to the sub-frames 103 and 104 in an open condition (FIG. 4), and positioned substantially parallel with respect to the sub-frames 103 and 104 when pivotally folded to a closed (i.e., collapsed) condition (FIG. 7).

Each support leg 111 is further connected to the sub-frame 103 by a brace member 115 for extra support in the open condition. Each brace member 115 has a first end pivotally connected to the side support 105 of a sub-frame 103 or 104 with a fastener 117 such as a pin or screw, and slidably connected to the support legs 111 on the opposing end. The brace member 115 includes a channel 119 which is slidably connected to the support legs 111 via a fastener such as a bolt or rivet. The channel 119 enables the support legs 111 to fold inward from the open condition to the closed condition and vice-versa in a more controlled manner.

In this second embodiment, the generally rectangular shaped sub-frames or sections 103 and 104 are pivotally connected to the other by a generally central transverse pivotal support member 121. The generally central transverse pivotal support member 121 can be of any cross-section dimension so long as the sub-frames 103 and 104 are capable of pivoting about the pivotal support member 121.

Referring to FIGS. 5 and 6, the folding bed 101 is illustratively shown in a partially closed position. The proximal ends 105 a of each side support 105 include a mounting flange 130. The mounting flanges can be integral with or securely attached thereon via one or more fasteners, weld and the like. The mounting flanges 130 (four mounting flanges shown in FIGS. 4-7) include an orifice sized to receive and rotate about a circular end of the central transverse pivotal support member 121. As illustratively shown in FIG. 6, a first pair of mounting flanges 130 ₁, and 130 ₂ each have ends that overlap one other at a first end of the central transverse pivotal support member 121. Similarly, a second pair of mounting flanges 130 ₃ and 130 ₄ (FIG. 7) each have ends that overlap one other at the opposing second end of the central transverse pivotal support member 121. The mounting flanges 130 enable the proximal ends 105 a of the sub-frames 103 and 104 to rotate (pivot) about the opposing ends of the central transverse pivotal support member 121 when the folding bed 101 is opened and closed.

When the folding bed frame 101 is in an open condition, the opposing ends of the pivotal support member 121 are supported by a pair of laterally spaced apart support members 123, which are connected by a lateral support member 125. The laterally spaced apart support members 123 are connected to each sub-frame 103 and 104 by a pair of angled supporting braces 127. Each end of the angled supporting braces 127 are pivotally connected to the laterally spaced apart support member 123 at one end, and to the sub-frame 103 or 104 at the opposing end. The additional support provided by the angled supporting braces 127 advantageously enables the laterally spaced apart support members 123 to remain upright and aligned with the generally central transverse pivotal support member 121 at all times.

It is further noted that the upper ends of the support members 123 each include a substantially horizontal flange 132. Preferably, the horizontal flanges 132 are formed as U-shaped end portions 132 that extend upward, although such configuration is not considered limiting. The U-shaped end portions 132 are include a curved upper portion sized to receive and support a bottom surface of the circular-shaped central transverse pivotal support member 121 when the folding bed 101 is in a fully opened condition, thereby providing additional support and stability to the folding bed 101 when opened.

Referring to FIG. 8, a stopper member 140 can be provided on each lower end of the supporting braces 127. Each stopper member 140 is configured to interface with a side portion of the support member 123 as the sub-frames 103 and 104 are moved into an opened condition. As the foldable bed frame 101 is fully opened, the stoppers 140 on the braces 127 move towards the side surfaces of the support member 123. The stoppers 140 are formed as flanges that limit the rotational movement of the support member 123 as the support member moves in an upward direction towards the central transverse pivotal support member 121. If, by chance, the U-shaped end portion 132 of the support member 123 is not properly aligned with the central transverse pivotal support member 121, the stoppers 140 will push and guide the support member 121 back into proper alignment. Alternative stopper member configurations are also contemplated. For example, the stopper members can extend inward to interface with the lateral support member 125.

Referring to FIG. 9, two folding bed frames 101 can be placed adjacent each other in an open condition to provide a larger sleeping area. Preferably, the adjacent side supports 105 are fastened together with one or more fasteners, such as one or more brackets 136 as shown in FIG. 4 to provide additional stability. The fasteners can alternatively include one or more bolts, latches, and/or hooks, among other conventionally known fasteners. Alternatively, as shown in FIG. 6, at least one aperture 134 is formed along the side supports 105 to receive a bolt or other fastener for securing adjacent foldable bed frames together.

Accordingly, a foldable bed frame has been shown, which includes at least a pair of sub-frames having a plurality of elongated members respectively connected to form a generally rectangular shaped section. Each rectangular shaped section is foldably attached to the other so as to be folded to a collapsed condition and unfolded to an open co-planar condition for use as a mattress support. Each generally rectangular shaped section has at least one side member adjacent to a corresponding side member of the other generally rectangular shaped section, such that when the generally rectangular shaped sections are unfolded to the open condition, the correspondingly adjacent side members engage each other in contacting relation to form a generally central transverse support structure. Furthermore, a pair of laterally spaced apart support members is positioned beneath the generally central transverse support structure and in generally perpendicular relation thereto.

Advantageously, the spaced apart support members move into supporting engagement with the generally central transverse support structure when the generally rectangular shaped sections are unfolded to the open condition to provide support to the pair of generally rectangular shaped sections at the interface thereto. Moreover, the pair of laterally spaced apart support members is drawn away from the central transverse support structure without tilting when the generally rectangular shaped sections are folded to the collapsed condition.

While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. 

1. A foldable bed frame, which comprises: a) at least a pair of generally rectangular shaped sub-frames foldably attached to each other so as to be folded in a collapsed condition and unfolded to an open condition for use as a mattress support, said foldable attachment being arranged and configured such that when said sub-frames are unfolded to the open condition, a generally central transverse support means is located at the interface thereof; and b) a pair of laterally spaced apart support members positioned beneath said generally central transverse support means and in generally perpendicular relation thereto, said spaced apart support members attached to said sub-frames in a manner to be in supporting engagement with said generally central transverse support means when said sub-frames are unfolded to the open condition, to thereby provide support to said pair of sub-frames at the interface thereof, said pair of spaced apart support members each being attached to said sub-frames in a manner to be drawn away from said generally central transverse support means when said sub-frames are folded to the collapsed condition.
 2. The foldable bed frame according to claim 1, wherein each of said generally rectangular shaped sub-frames comprises a pair of substantially parallel, spaced apart side support members respectively having proximal and distal ends, said side support members are connected by lateral support members at a location between the proximal and distal ends of said side support members, and at a location at or near the distal ends, said lateral support members being shorter in length than said side support members.
 3. The foldable bed frame according to claim 2, wherein each of said generally rectangular shaped sub-frames further comprises a pair of spaced apart support legs having respective free ends, each of said support legs pivotally connected to said generally rectangular shaped sub-frame at or near the distal ends of said side supports, said support legs connected to each other by a lateral support member positioned between said rectangular shaped sub-frame and the free ends of said support legs, said support legs pivotal between a position substantially parallel to said rectangular shaped sub-frame and a position generally perpendicular thereto.
 4. The foldable bed frame according to claim 3, wherein each of said pair of laterally spaced apart support members are connected to each said sub-frame by a pair of angled supporting braces having a first end and a second end, said first ends of said supporting braces pivotally connected to said laterally spaced apart support members, said second ends of said supporting braces pivotally connected to said respective sub-frame.
 5. The foldable bed frame according to claim 4, wherein said generally transverse support means is a pivotal lateral support member commonly joining the proximal ends of said side supports of each of said sub-frames to permit said sub-frames to be folded with respect to each other.
 6. The foldable bed frame according to claim 5, wherein each of said support legs are connected to said generally rectangular shaped sub-frame by a brace member, said brace member pivotally connected to said generally rectangular shaped sub-frame on one end and slidably connected to said support legs at another end such that said support legs are movable from the position generally perpendicular to said generally rectangular shaped sub-frame to the position generally parallel to said generally rectangular shaped sub-frame.
 7. The foldable bed frame according to claim 4, further comprising a lateral support member at or near the proximal end of each of said sub-frames.
 8. The foldable bed frame according to claim 7, wherein said lateral support members located at or near the proximal ends of the sub-frames move toward each other to be engaged in adjacent relation to form said transverse support means when said sub-frames are in the open condition.
 9. The foldable bed frame of claim 2, further comprising one or more fasteners coupled to at least one side support member, said fasteners being configured to retain a side member of an adjacent foldable bed frame thereto.
 10. A foldable bed frame, which comprises: a) at least a pair of sub-frames, each said sub-frame being constructed of a plurality of elongated members respectively connected to form a generally rectangular shaped section, each said generally rectangular shaped section being pivotally connected to the other by a generally central transverse pivotal support member, said generally rectangular shaped sections being pivotal between an open generally co-planar position for use as a mattress support, and a folded position, whereby said generally rectangular shaped sections are in face-to-face relation; b) a pair of support legs respectively pivotally connected to each said generally rectangular shaped sections at the free end thereof and foldable from a position generally parallel to the plane of each said respective generally rectangular shaped section, to a position generally perpendicular to each respective generally rectangular shaped section, said last mentioned position capable of supporting said generally rectangular shaped sections in a generally horizontal position for use as a mattress support; and c) a pair of laterally spaced apart support members positioned beneath said generally central transverse pivotal support member and in generally perpendicular relation thereto, said spaced apart support members being in supporting engagement with said generally transverse pivotal support member when said pair of generally rectangular shaped sections are in said open condition to provide support to said pair of generally rectangular shaped sections at the pivotal connection thereof, said pair of laterally spaced apart support members each being respectively attached to said pair of generally rectangular shaped sections in a manner to be withdrawn away from said central transverse pivotal support member when said sub-frames are pivotally folded toward each other.
 11. The foldable bed frame of claim 10, wherein the plurality of elongated members of each sub-frame include a pair of opposing side members having an outer cross-member interconnected therebetween at a distal end, said central traverse pivotal support member being positioned at a proximal end of the opposing side members to form the generally rectangular shaped section.
 12. The foldable bed frame of claim 11, wherein the pair of support legs is respectively pivotally connected to each of the side members of said generally rectangular shaped sections.
 13. The foldable bed frame of claim 11, wherein each support leg is pivotally connected to a side member by a pair of angled supporting braces.
 14. The foldable bed frame of claim 13, wherein the each of the pair of angled supporting braces includes a stopper member extending proximate the pivotal connection to align the support leg with the central traverse pivotal support member.
 15. A foldable bed frame, which comprises: a) at least a pair of sub-frames, each sub-frame including a plurality of elongated members respectively connected to form a generally rectangular shaped section, each said rectangular shaped section being foldably attached to the other so as to be folded to a collapsed condition and unfolded to an open co-planar condition for use as a mattress support; b) each said generally rectangular shaped section having at least one side member adjacent to a corresponding side member of the other generally rectangular shaped section, such that when said generally rectangular shaped sections are unfolded to said open condition, said correspondingly adjacent side members engage each other in contacting relation to form a generally central transverse support structure; c) a pair of laterally spaced apart support members positioned beneath said generally central transverse support structure and in generally perpendicular relation thereto, said spaced apart support members moved into supporting engagement with said generally central transverse support structure when said generally rectangular shaped sections are unfolded to said open condition to thereby provide support to said pair of generally rectangular shaped sections at the interface thereto, and said pair of laterally spaced apart support members being drawn away from said central transverse support structure when said generally rectangular shaped sections are folded to said collapsed condition. 